The long and short forms of options, shown here as alternatives,
are equivalent. At least one option besides -v or -H must be
given.
-a
--all
Equivalent to specifying --file-header, --program-headers,
--sections, --symbols, --relocs, --dynamic, --notes,
--version-info, --arch-specific, --unwind, --section-groups
and --histogram.
Note - this option does not enable --use-dynamic itself, so
if that option is not present on the command line then
dynamic symbols and dynamic relocs will not be displayed.
-h
--file-header
Displays the information contained in the ELF header at the
start of the file.
-l
--program-headers
--segments
Displays the information contained in the file's segment
headers, if it has any.
-S
--sections
--section-headers
Displays the information contained in the file's section
headers, if it has any.
-g
--section-groups
Displays the information contained in the file's section
groups, if it has any.
-t
--section-details
Displays the detailed section information. Implies -S.
-s
--symbols
--syms
Displays the entries in symbol table section of the file, if
it has one. If a symbol has version information associated
with it then this is displayed as well. The version string
is displayed as a suffix to the symbol name, preceded by an @
character. For example foo@VER_1. If the version is the
default version to be used when resolving unversioned
references to the symbol then it is displayed as a suffix
preceded by two @ characters. For example foo@@VER_2.
--dyn-syms
Displays the entries in dynamic symbol table section of the
file, if it has one. The output format is the same as the
format used by the --syms option.
--lto-syms
Displays the contents of any LTO symbol tables in the file.
-C
--demangle[=style]
Decode (demangle) low-level symbol names into user-level
names. This makes C++ function names readable. Different
compilers have different mangling styles. The optional
demangling style argument can be used to choose an
appropriate demangling style for your compiler.
--no-demangle
Do not demangle low-level symbol names. This is the default.
--recurse-limit
--no-recurse-limit
--recursion-limit
--no-recursion-limit
Enables or disables a limit on the amount of recursion
performed whilst demangling strings. Since the name mangling
formats allow for an infinite level of recursion it is
possible to create strings whose decoding will exhaust the
amount of stack space available on the host machine,
triggering a memory fault. The limit tries to prevent this
from happening by restricting recursion to 2048 levels of
nesting.
The default is for this limit to be enabled, but disabling it
may be necessary in order to demangle truly complicated
names. Note however that if the recursion limit is disabled
then stack exhaustion is possible and any bug reports about
such an event will be rejected.
-e
--headers
Display all the headers in the file. Equivalent to -h -l -S.
-n
--notes
Displays the contents of the NOTE segments and/or sections,
if any.
-r
--relocs
Displays the contents of the file's relocation section, if it
has one.
-u
--unwind
Displays the contents of the file's unwind section, if it has
one. Only the unwind sections for IA64 ELF files, as well as
ARM unwind tables (".ARM.exidx" / ".ARM.extab") are currently
supported. If support is not yet implemented for your
architecture you could try dumping the contents of the
.eh_frames section using the --debug-dump=frames or
--debug-dump=frames-interp options.
-d
--dynamic
Displays the contents of the file's dynamic section, if it
has one.
-V
--version-info
Displays the contents of the version sections in the file, it
they exist.
-A
--arch-specific
Displays architecture-specific information in the file, if
there is any.
-D
--use-dynamic
When displaying symbols, this option makes readelf use the
symbol hash tables in the file's dynamic section, rather than
the symbol table sections.
When displaying relocations, this option makes readelf
display the dynamic relocations rather than the static
relocations.
-L
--lint
--enable-checks
Displays warning messages about possible problems with the
file(s) being examined. If used on its own then all of the
contents of the file(s) will be examined. If used with one
of the dumping options then the warning messages will only be
produced for the things being displayed.
-x <number or name>
--hex-dump=<number or name>
Displays the contents of the indicated section as a
hexadecimal bytes. A number identifies a particular section
by index in the section table; any other string identifies
all sections with that name in the object file.
-R <number or name>
--relocated-dump=<number or name>
Displays the contents of the indicated section as a
hexadecimal bytes. A number identifies a particular section
by index in the section table; any other string identifies
all sections with that name in the object file. The contents
of the section will be relocated before they are displayed.
-p <number or name>
--string-dump=<number or name>
Displays the contents of the indicated section as printable
strings. A number identifies a particular section by index
in the section table; any other string identifies all
sections with that name in the object file.
-z
--decompress
Requests that the section(s) being dumped by x, R or p
options are decompressed before being displayed. If the
section(s) are not compressed then they are displayed as is.
-c
--archive-index
Displays the file symbol index information contained in the
header part of binary archives. Performs the same function
as the t command to ar, but without using the BFD library.
-w[lLiaprmfFsOoRtUuTgAckK]
--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
Displays the contents of the DWARF debug sections in the
file, if any are present. Compressed debug sections are
automatically decompressed (temporarily) before they are
displayed. If one or more of the optional letters or words
follows the switch then only those type(s) of data will be
dumped. The letters and words refer to the following
information:
"a"
"=abbrev"
Displays the contents of the .debug_abbrev section.
"A"
"=addr"
Displays the contents of the .debug_addr section.
"c"
"=cu_index"
Displays the contents of the .debug_cu_index and/or
.debug_tu_index sections.
"f"
"=frames"
Display the raw contents of a .debug_frame section.
"F"
"=frame-interp"
Display the interpreted contents of a .debug_frame
section.
"g"
"=gdb_index"
Displays the contents of the .gdb_index and/or
.debug_names sections.
"i"
"=info"
Displays the contents of the .debug_info section. Note:
the output from this option can also be restricted by the
use of the --dwarf-depth and --dwarf-start options.
"k"
"=links"
Displays the contents of the .gnu_debuglink and/or
.gnu_debugaltlink sections. Also displays any links to
separate dwarf object files (dwo), if they are specified
by the DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in
the .debug_info section.
"K"
"=follow-links"
Display the contents of any selected debug sections that
are found in linked, separate debug info file(s). This
can result in multiple versions of the same debug section
being displayed if it exists in more than one file.
In addition, when displaying DWARF attributes, if a form
is found that references the separate debug info file,
then the referenced contents will also be displayed.
"l"
"=rawline"
Displays the contents of the .debug_line section in a raw
format.
"L"
"=decodedline"
Displays the interpreted contents of the .debug_line
section.
"m"
"=macro"
Displays the contents of the .debug_macro and/or
.debug_macinfo sections.
"o"
"=loc"
Displays the contents of the .debug_loc and/or
.debug_loclists sections.
"O"
"=str-offsets"
Displays the contents of the .debug_str_offsets section.
"p"
"=pubnames"
Displays the contents of the .debug_pubnames and/or
.debug_gnu_pubnames sections.
"r"
"=aranges"
Displays the contents of the .debug_aranges section.
"R"
"=Ranges"
Displays the contents of the .debug_ranges and/or
.debug_rnglists sections.
"s"
"=str"
Displays the contents of the .debug_str, .debug_line_str
and/or .debug_str_offsets sections.
"t"
"=pubtype"
Displays the contents of the .debug_pubtypes and/or
.debug_gnu_pubtypes sections.
"T"
"=trace_aranges"
Displays the contents of the .trace_aranges section.
"u"
"=trace_abbrev"
Displays the contents of the .trace_abbrev section.
"U"
"=trace_info"
Displays the contents of the .trace_info section.
Note: displaying the contents of .debug_static_funcs,
.debug_static_vars and debug_weaknames sections is not
currently supported.
--dwarf-depth=n
Limit the dump of the ".debug_info" section to n children.
This is only useful with --debug-dump=info. The default is
to print all DIEs; the special value 0 for n will also have
this effect.
With a non-zero value for n, DIEs at or deeper than n levels
will not be printed. The range for n is zero-based.
--dwarf-start=n
Print only DIEs beginning with the DIE numbered n. This is
only useful with --debug-dump=info.
If specified, this option will suppress printing of any
header information and all DIEs before the DIE numbered n.
Only siblings and children of the specified DIE will be
printed.
This can be used in conjunction with --dwarf-depth.
--ctf=section
Display the contents of the specified CTF section. CTF
sections themselves contain many subsections, all of which
are displayed in order.
--ctf-parent=section
Specify the name of another section from which the CTF
dictionary can inherit types. (If none is specified, we
assume the CTF dictionary inherits types from the default-
named member of the archive contained within this section.)
--ctf-symbols=section
--ctf-strings=section
Specify the name of another section from which the CTF file
can inherit strings and symbols. By default, the ".symtab"
and its linked string table are used.
If either of --ctf-symbols or --ctf-strings is specified, the
other must be specified as well.
-I
--histogram
Display a histogram of bucket list lengths when displaying
the contents of the symbol tables.
-v
--version
Display the version number of readelf.
-W
--wide
Don't break output lines to fit into 80 columns. By default
readelf breaks section header and segment listing lines for
64-bit ELF files, so that they fit into 80 columns. This
option causes readelf to print each section header resp. each
segment one a single line, which is far more readable on
terminals wider than 80 columns.
-T
--silent-truncation
Normally when readelf is displaying a symbol name, and it has
to truncate the name to fit into an 80 column display, it
will add a suffix of "[...]" to the name. This command line
option disables this behaviour, allowing 5 more characters of
the name to be displayed and restoring the old behaviour of
readelf (prior to release 2.35).
-H
--help
Display the command-line options understood by readelf.
@file
Read command-line options from file. The options read are
inserted in place of the original @file option. If file does
not exist, or cannot be read, then the option will be treated
literally, and not removed.
Options in file are separated by whitespace. A whitespace
character may be included in an option by surrounding the
entire option in either single or double quotes. Any
character (including a backslash) may be included by
prefixing the character to be included with a backslash. The
file may itself contain additional @file options; any such
options will be processed recursively.
